vendor/assets/javascripts/polyfills/polyfills.coffee in tao_on_rails-0.6.9 vs vendor/assets/javascripts/polyfills/polyfills.coffee in tao_on_rails-0.6.10

@@ -1,7 +1,7 @@
 #= require ./native-shim
 #= require ./custom-elements
 #= require jquery3
 #= require_self
 
-customElements.polyfillWrapFlushCallback? (flush) ->
+window.customElements?.polyfillWrapFlushCallback? (flush) ->
   $ -> flush()